Heating or drying drum



J D MCCRACKEN HEATING OR DRYING DRUM Filed June 25j.

Marchl4 1924.

Patented Mar. 4, 1924.

UNITED STATES Meana Partnr :arrasa Y JAMES n. MCGRACKEN, or CINCINNATI,onio, AssIGNon' 'ro man UNITED sfrArEs PLAYING CARD COMPANY, or Nonwoon,oIIIo, a CORPORATION or oHIog' IEIIlA'ilINGl ORDRYING DRUM.

Application led June 25, 1923. Serial No. 647,424.

To all whom t may concern:

Be it known that I, JAMES D. MCCRACKEN, a citizen of the United States,and residing at Cincinnati, in the county of Hamilton and State of Ohio,have invented a new and useful Improvement in Heating or Drying Drums,of which the following specification is a full disclosure.

This invention relates to al rotating heating or drying drum primarilyfor carrying over its outer cylindrical surface a web or sheet of paperto be dried and particularly applicable in connection with printing orlithographing apparatus.

An object of the invention is to provide a hollow revolving cylindricaldrum, with stationary concentric tubes extending axially into andthrough the axis of the drum as independent conduits in communicationwith the interior of the drum, one for supplying steam to a body ofwater withinthe drum, and the second having an angle extension for anoverflow or drawof't1 connection for maintaining a determined anduniform water capacity or level within the drum, establishing a methodof heating whereby a more uniform distribution of temperature will beattained.

Further objects and advantages of the invention will be more fully setforth in the description of the accompanying drawing forming a part ofthis specification, in which the figure represents a central verticalsection through the drum, its supporting bearings, and tubes forheatingl the water within the drum.

1 indicates a hollow cylindrical drum usually of cast iron which isnormally filled with water heated by steam, and in operation the drum isrevolved about its axis carrying over its outer surface a web of paperor the like to be dried. The drum, at each of its opposite ends andaxially therewith, is provided with tubular trunnions 3, 4 preferablyformed integral with the end of the drums, and respectively journalledin the bearings 5, 6. Upon the end of the trunnion 4, which is ofextended length, a gear 7 is fixed, affording means for rotating thedrum.

A tube or pipe 8 is extended into the drum axially through the tubulartrunnion 4 which at one end exterior of the drum is supported orsustained in a stationary and horizontal position axially of the drum bya suitable bearing or support 9 adjacent the end of the trunnion 4. Thepipe 8 is projected through a stuffing box 19 or packing in the trunnion4 for sealing against leakage of water from.

the drum. The opposite or inner end of the pipe-8 is closed by a plug 10engaged with the end of the pipe and this end of the pipe is engagedinto the bore of the trunnion 3 to centralize the pipe withinv thedrum.rlhe trunnion 3 likewise being provided with a plug 10a as a removableclosure for the bore of the trunnion. The pipe 8 within the drum is`composed of sections connected by .a T-coupling 11 approximatelydisposed cen-A trally of the interior of the drum through which a pipeconnection is made and supported for a right angle pipe extension 13 ofan overflow or drain pipe 12 concentrically disposed within the forwardportion of the pipe 8. The pipe 8 serves as a steam supply conduit andfor its length withinrthe drum is perforated to provide a plurality ofopenings 14 communicating with the interior of the drum.

The overflow or drain pipe 12 at its inner end within the T-coupling isprovided with an elbow 15 to which a nipple 16 is attached, the nipplebeing engaged through a reducer plug 17 engaged into the angle hub ofthe T-coupling. Upon the end of the nipple 16 the pipe section 13 issecured which engages against a washer 18 upon the reducer plug and thepipe section 13 extends vertically to provide for establishing anappropriate water level height within the druin. Any excess water supplyin the drum, resulting from the condensation of the steam admitted intothe drum from the perforated steam supply pipe 8 for heating the waterwithin the drum, rising above the height of the overflow pipe section 14will be drained from the drum. The overflow connection may lead as areturn line to the boiler and a pump may be introduced in the line toassist the exit of the water. The water level in the drum is thus helduniformly and any excess water drained off from the center of the drum.|The steam is admitted axially of the drum and approximately for theentire length thereof resulting in a complete and uniform heating of thewater and a more uniform distribution of temperature to the drum than isprovided with a direct steam heated drum.

The drum has one of its ends or heads provided with a manhole opening 20through which access is had to the interior of .the drum which isprovided with any/serviceable form of closure.

Having described my invention, I claim:

1. A drying cylinder, comprising 'a rota-4 tive hollow cylindrical drumadapted to hold* a volume of water, a steam admission conduit extendingaxially into the drum and through the axis of the drum atone end' A 2. Adrying cylinder, comprising `a rota-v tive hollow cylindrical drumadapted to hold V'a volume of water, a .steam `admission conduitextending through the axis at .one end of the drum axially into the drumand for the length thereof for dischargingsteam into the water in thedrum tofheat the same, and a second conduit extending axially into thedrum and terminating atan angle thereto providing a water levelcontrolling otake conduit.

3. A drying cylinder, comprising a rotativevhollow cylindrical drumadapted to hold a volume of water, a steam admission conduit extendingaxially into the drum through lone end offfthe-drum, anda second conduitextending axially into the drum concentrically within said first conduitand terminating at an angle Hthereto centrally of the drum providing l awater level controlling otake conduit. Y

4:. A drying cylinder, comprising a rotative hollow cylindrical drumadapted to hold avolumeof water, a stationary steam'admission conduitextending axially into the drum, and a second conduit within said firstconduit extending andV terminating lat an angle thereto. providing awater levelcontrolling oftake conduit.

In witnesswhereof, I hereunto subscribe my name, as attested by the twosubscribingy witnesses.

JAS. D. MCCRACKEN. Witnesses:

OSCAR FOURNIER, B. J. WELAGE.

